mirror of https://github.com/mkerrisk/man-pages
98 lines
2.4 KiB
Groff
98 lines
2.4 KiB
Groff
.\" Copyright (c) 1994 Mike Battersby
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" Modified by aeb, 960721
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.\"
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.TH SIGSETOPS 3 1994-09-24 "Linux 1.0" "Linux Programmer's Manual"
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.SH NAME
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sigemptyset, sigfillset, sigaddset, sigdelset, sigismember \- POSIX
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signal set operations.
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.SH SYNOPSIS
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.B #include <signal.h>
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.sp 2
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.BI "int sigemptyset(sigset_t *" set );
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.sp
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.BI "int sigfillset(sigset_t *" set );
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.sp
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.BI "int sigaddset(sigset_t *" set ", int " signum );
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.sp
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.BI "int sigdelset(sigset_t *" set ", int " signum );
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.sp
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.BI "int sigismember(const sigset_t *" set ", int " signum );
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.SH DESCRIPTION
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The
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.BR sigsetops (3)
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functions allow the manipulation of POSIX signal sets.
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.PP
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.B sigemptyset
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initializes the signal set given by
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.I set
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to empty, with all signals excluded from the set.
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.PP
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.B sigfillset
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initializes
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.I set
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to full, including all signals.
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.PP
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.B sigaddset
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and
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.B sigdelset
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add and delete respectively signal
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.I signum
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from
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.IR set .
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.PP
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.B sigismember
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tests whether
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.I signum
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is a member of
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.IR set .
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.SH "RETURN VALUE"
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.BR sigemptyset ", " sigfillset ", " sigaddset
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and
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.B sigdelset
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return 0 on success and \-1 on error.
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.PP
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.B sigismember
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returns 1 if
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.I signum
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is a member of
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.IR set ,
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0 if
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.I signum
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is not a member, and \-1 on error.
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.SH ERRORS
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.TP
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.B EINVAL
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.I sig
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is not a valid signal.
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.SH "CONFORMING TO"
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POSIX
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.SH "SEE ALSO"
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.BR sigaction (2),
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.BR sigpending (2),
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.BR sigprocmask (2),
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.BR sigsuspend (2)
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